APA (7th ed.) Citation

Ludeen, M. T., Obata, M., & Dickey, J. S. (1979). Geologic map of the Ronda ultramafic complex, southern Spain. Geological Society of America.

Chicago Style (17th ed.) Citation

Ludeen, Margaret Thompson, Masaaki Obata, and John S. Dickey. Geologic Map of the Ronda Ultramafic Complex, Southern Spain. Boulder, Colo.: Geological Society of America, 1979.

MLA (9th ed.) Citation

Ludeen, Margaret Thompson, et al. Geologic Map of the Ronda Ultramafic Complex, Southern Spain. Geological Society of America, 1979.